WEBVTT 00:00.440 --> 00:04.220 In the last section, we spoke about how it's probably going to make sense to have two different Docker 00:04.220 --> 00:04.910 files. 00:04.910 --> 00:09.650 One Docker file will be responsible for running our application development, the other in production. 00:09.680 --> 00:13.820 In this section we're going to start working on the Docker file that is going to run our application 00:13.820 --> 00:14.630 in development. 00:14.630 --> 00:16.070 So let's get to it. 00:16.100 --> 00:17.990 I'm going to flip back over to my terminal. 00:17.990 --> 00:21.410 And I'm going to open up my code editor inside of our project directory. 00:22.490 --> 00:26.090 Inside of this project folder I'm going to create a new Docker file. 00:26.120 --> 00:30.140 But I'm going to give it a name slightly different than the name that we've seen before. 00:30.530 --> 00:34.610 I'm going to create a file called Docker file.dev. 00:35.390 --> 00:39.530 The purpose of the.dev on the end right there is going to make sure that it's really clear that this 00:39.530 --> 00:44.630 Docker file is only used when we are trying to run our application in a development environment. 00:44.630 --> 00:50.000 In the future, we're going to put together a second Docker file for running this thing in production, 00:50.000 --> 00:53.270 and it's going to have a name of simply docker file. 00:53.270 --> 00:58.310 So that Docker file that is named simply Docker file will be the one that we use for production. 00:58.340 --> 01:03.230 Otherwise, if we're running locally and we're trying to actively develop our application, we'll build 01:03.230 --> 01:08.210 our image and we'll start up our container using the dockerfile.dev file instead. 01:09.230 --> 01:14.390 So inside of the dockerfile.dev file, we're going to write out a little bit of different configuration 01:14.390 --> 01:18.140 to create an image very similar to some that we've made use of before. 01:18.170 --> 01:21.230 We're going to first start with a base image. 01:21.230 --> 01:24.650 So I'll say from node colon alpine. 01:24.770 --> 01:26.750 We'll then set up a working directory. 01:26.750 --> 01:29.720 So I'll say Workdir of app. 01:30.350 --> 01:33.380 We'll then copy over our package.json. 01:33.380 --> 01:39.800 So I will copy package.json to the current working directory of slash app. 01:39.980 --> 01:43.190 And then we will run the command npm install. 01:43.880 --> 01:50.240 After we install all all of our dependencies we'll then copy over everything else from our project directory. 01:50.240 --> 01:53.090 So I'll say copy dot dot. 01:53.420 --> 01:58.310 And then finally we can run our command to start up our project with cmd. 01:58.640 --> 02:05.630 And then inside of our square braces we'll say npm run start like so. 02:06.650 --> 02:06.980 All right. 02:06.980 --> 02:10.250 So that's pretty much it for our development Docker file. 02:10.280 --> 02:14.360 We've ran exactly essentially exactly the same Docker file before. 02:14.360 --> 02:15.740 So not a lot of confusion here. 02:15.740 --> 02:18.500 I think that we've got a reasonable idea of what's going to happen. 02:18.740 --> 02:20.630 Let's try flipping over to our terminal. 02:20.630 --> 02:24.980 And we're going to figure out how we can run a Docker file with a custom file name. 02:25.670 --> 02:28.050 Now, the reason I say a custom name is. 02:28.050 --> 02:32.940 Remember, any time you run docker build, it's going to look for a file inside the current working 02:32.940 --> 02:35.430 directory called just docker file. 02:35.460 --> 02:37.920 Let's try running that right now and just see what happens. 02:37.950 --> 02:42.870 I'll say docker build dot and you'll notice that we get a little error message here. 02:42.870 --> 02:46.350 It says hey you don't have anything inside of here called Docker file. 02:46.380 --> 02:54.510 So in order to make sure that we build our project using the Docker file.dev file, we're going to make 02:54.510 --> 02:57.750 a little tweak to the docker build command. 02:58.050 --> 03:01.740 So we're going to run Docker build. 03:01.740 --> 03:08.070 And then we're going to add on a dash f f means we're trying to specify the file that's going to be 03:08.070 --> 03:10.170 used to build out the image. 03:10.380 --> 03:13.320 And we'll say docker file.dev. 03:14.190 --> 03:15.540 And that's it. 03:15.570 --> 03:17.490 We'll put the dot on there and that's it. 03:19.170 --> 03:20.430 And there we go. 03:20.460 --> 03:20.730 Okay. 03:20.760 --> 03:22.920 So it's going to now load up our image. 03:22.920 --> 03:25.740 It's going to create the Docker file and create the image. 03:25.770 --> 03:29.070 Now as we're building the image you might see a couple of warnings appear here. 03:29.070 --> 03:29.820 That's totally fine. 03:29.820 --> 03:31.050 You could ignore the warnings. 03:31.050 --> 03:33.360 If you see anything that specifically says error. 03:33.390 --> 03:35.910 That's when we want to start to get a little bit concerned. 03:36.000 --> 03:36.450 All right. 03:36.450 --> 03:40.200 So let's take a quick pause right here and we'll continue in the next section after we successfully 03:40.200 --> 03:41.250 built our image.