1
00:00:00,000 --> 00:00:04,200
[Intro Music]

2
00:00:04,230 --> 00:00:06,723
All right, we have just pulled 'node'

3
00:00:06,723 --> 00:00:08,550
image from Docker Hub; and we

4
00:00:08,550 --> 00:00:10,560
have created first a Node.js

5
00:00:10,560 --> 00:00:12,540
container, and we have basically

6
00:00:12,540 --> 00:00:14,940
executed some commands like console.

7
00:00:14,940 --> 00:00:17,100
log, or assignment of the value to

8
00:00:17,100 --> 00:00:18,480
the variable inside of the

9
00:00:18,480 --> 00:00:21,540
interactive interpreter of Node.js

10
00:00:21,540 --> 00:00:23,550
inside of the container. And now

11
00:00:23,550 --> 00:00:25,710
let's create the sample Node.js

12
00:00:25,710 --> 00:00:27,660
application as we did with Python,

13
00:00:27,840 --> 00:00:29,280
and let's do that on our local

14
00:00:29,280 --> 00:00:31,230
computer, and afterwards, let's run

15
00:00:31,230 --> 00:00:33,870
it using Node.js container. Let me

16
00:00:33,870 --> 00:00:36,000
clear terminal and go to Visual

17
00:00:36,000 --> 00:00:37,890
Studio Code, and create here,

18
00:00:38,130 --> 00:00:40,740
new folder near folders 'nginx',

19
00:00:40,740 --> 00:00:43,500
'python', and so on. Let's close any

20
00:00:43,560 --> 00:00:46,230
related to previous projects files.

21
00:00:46,350 --> 00:00:48,360
And here let's create a new folder,

22
00:00:48,360 --> 00:00:51,360
and let's name it 'node', like so.

23
00:00:51,480 --> 00:00:53,130
And here inside of this folder,

24
00:00:53,130 --> 00:00:55,590
let's create a new file, simply

25
00:00:55,590 --> 00:00:58,590
hello.js, like this. And here in

26
00:00:58,590 --> 00:01:00,450
this file, let's simply type

27
00:01:00,450 --> 00:01:03,870
console.log('This application

28
00:01:03,870 --> 00:01:09,700
was executed by Node.js container')',

29
00:01:09,720 --> 00:01:12,750
like so. Let's save this. And also

30
00:01:12,750 --> 00:01:14,820
you're able to wrap long lines

31
00:01:14,850 --> 00:01:17,190
using key combination 'Alt' + option

32
00:01:17,220 --> 00:01:19,590
'z', like so. And let me hide this

33
00:01:19,590 --> 00:01:21,270
left pane and we are actually ready

34
00:01:21,270 --> 00:01:23,220
to go and we are ready to execute

35
00:01:23,250 --> 00:01:25,860
this tiny application inside of the

36
00:01:25,860 --> 00:01:28,650
single file hello.js using Node

37
00:01:28,650 --> 00:01:31,080
container. Let's go to terminal and

38
00:01:31,110 --> 00:01:32,640
of course, you may guess that we

39
00:01:32,640 --> 00:01:35,100
need to use here volume mapping

40
00:01:35,130 --> 00:01:37,260
in order to map our volume on our

41
00:01:37,260 --> 00:01:39,540
local computer to a specific folder

42
00:01:39,570 --> 00:01:41,370
inside of the container that will

43
00:01:41,370 --> 00:01:43,830
be running Node.js. Let's do so.

44
00:01:44,010 --> 00:01:46,380
Let's first 'cd' to 'node' folder,

45
00:01:46,380 --> 00:01:47,850
because we will use the same as

46
00:01:47,850 --> 00:01:50,430
before, variable 'PWD'; and that's why

47
00:01:50,430 --> 00:01:52,470
we need to be inside of the folder

48
00:01:52,500 --> 00:01:54,960
that has files that we need to map

49
00:01:55,200 --> 00:01:57,840
to container. Let's 'cd' to 'node', and

50
00:01:57,840 --> 00:02:00,240
here let's run container, 'docker

51
00:02:00,720 --> 00:02:03,870
run -v', we will use a volume mapping,

52
00:02:03,870 --> 00:02:08,370
'$PWD', next ':', and let's map

53
00:02:08,370 --> 00:02:11,310
this local folder to '/app' folder,

54
00:02:11,340 --> 00:02:12,900
same as we did in Python

55
00:02:12,900 --> 00:02:14,580
application. And of course, let's

56
00:02:14,580 --> 00:02:16,110
specify here working directory

57
00:02:16,140 --> 00:02:18,120
inside of the node container using

58
00:02:18,150 --> 00:02:19,680
'-w' option, and here

59
00:02:19,680 --> 00:02:22,920
let's type '/app', like so. And

60
00:02:22,920 --> 00:02:26,280
next comes 'node', it is name of the

61
00:02:26,310 --> 00:02:28,050
image that we will use for creation

62
00:02:28,080 --> 00:02:30,000
of this container. And afterwards,

63
00:02:30,030 --> 00:02:32,220
let's override the default command,

64
00:02:32,280 --> 00:02:33,750
that is actually 'node' command,

65
00:02:33,870 --> 00:02:36,300
using 'node', plus name of the file

66
00:02:36,330 --> 00:02:38,310
that we want to execute inside of

67
00:02:38,310 --> 00:02:40,080
the container. And for that, let's

68
00:02:40,080 --> 00:02:42,660
simply type 'node'', and next comes

69
00:02:42,690 --> 00:02:44,850
name of the file, and name of our

70
00:02:44,850 --> 00:02:47,430
file is 'hello.js'. Let's here

71
00:02:47,430 --> 00:02:50,040
type 'hello.js'. And please note

72
00:02:50,040 --> 00:02:52,080
that here is command that will be

73
00:02:52,110 --> 00:02:54,060
executed upon creation of the

74
00:02:54,060 --> 00:02:56,400
container. Here's name of the

75
00:02:56,400 --> 00:02:58,860
image. Great. Let's press Enter, and

76
00:02:58,860 --> 00:03:02,430
see what will happen. And I see

77
00:03:02,430 --> 00:03:04,020
result, 'This application was

78
00:03:04,050 --> 00:03:06,810
executed by Node.js container'; and

79
00:03:06,810 --> 00:03:09,663
that means that our script, hello.js

80
00:03:09,663 --> 00:03:12,150
was successfully executed by

81
00:03:12,210 --> 00:03:14,880
Node.js container. But after

82
00:03:14,910 --> 00:03:16,830
execution of the script, process,

83
00:03:16,860 --> 00:03:18,870
'node' process was terminated; and

84
00:03:18,870 --> 00:03:20,790
container was stopped. We could

85
00:03:20,790 --> 00:03:22,710
verify that as usually using 'docker

86
00:03:22,740 --> 00:03:25,050
ps' command. There are no containers

87
00:03:25,080 --> 00:03:26,700
at the moment. This is how you're

88
00:03:26,700 --> 00:03:28,680
able to run a very simple

89
00:03:28,680 --> 00:03:30,810
application using Node.js

90
00:03:30,810 --> 00:03:33,300
container. And notice that we were

91
00:03:33,300 --> 00:03:35,250
not required to create port mapping

92
00:03:35,280 --> 00:03:36,960
because this application doesn't

93
00:03:36,960 --> 00:03:39,660
require any external ports. But if

94
00:03:39,660 --> 00:03:42,030
you create any for example API

95
00:03:42,060 --> 00:03:44,340
using Node.js, then you probably need

96
00:03:44,340 --> 00:03:45,870
to open some ports in order to

97
00:03:45,870 --> 00:03:48,960
access endpoints, API endpoints from

98
00:03:48,990 --> 00:03:51,840
external clients. Great. This is how

99
00:03:51,840 --> 00:03:53,610
we are able to run very simple

100
00:03:53,610 --> 00:03:55,650
application using Node.js But please

101
00:03:55,650 --> 00:03:57,510
note that things may become more

102
00:03:57,510 --> 00:03:59,640
complicated if you want to install

103
00:03:59,670 --> 00:04:02,250
some additional dependencies using

104
00:04:02,280 --> 00:04:05,370
npm. Let's try to create a bit more

105
00:04:05,370 --> 00:04:07,530
complicated Node.js application that

106
00:04:07,530 --> 00:04:09,840
will require some additional NPM

107
00:04:09,840 --> 00:04:12,100
modules. Let's do that next. Bye-Bye.

108
00:04:12,100 --> 00:04:14,400
[no audio]