add restart policy to docker compose, add sample dockerfile for demoing features

06-building-container-images/Dockerfile.sample

@@ -32,6 +32,5 @@ ENV ENV_VAR=bar
 # Use the convention of your language/framework 
 WORKDIR path/to/the/working/directory
 
-
 ENTRYPOINT [ "echo", "Hey Team 👋 (entrypoint)" ]
 CMD [ "+ (cmd)" ]

06-building-container-images/Makefile

@@ -13,3 +13,44 @@ compose-up-build:
 .PHONY: compose-down
 compose-down:
 	docker compose down
+
+.PHONY: build-sample
+build-sample:
+	docker build -t sample -f Dockerfile.sample .
+
+define ENTRYPOINT_CMD_DESCRIPTION
+##############################
+
+See Dockerfile.sample for image definition.
+
+This series of docker run commands is meant
+to help you understand the interaction between
+CMD and ENTRYPOINT.
+
+The image has the following:
+
+ ENTRYPOINT [ "echo", "Hey Team 👋 (entrypoint)" ]
+ CMD [ "+ (cmd)" ]
+
+##############################
+endef
+export ENTRYPOINT_CMD_DESCRIPTION
+
+.PHONY: run-sample-entrypoint-cmd
+run-sample-entrypoint-cmd: build-sample
+	@echo "$$ENTRYPOINT_CMD_DESCRIPTION"
+
+	@echo "Run with no arguments:"
+	docker run sample
+
+	@echo "##############################"
+	@echo "Run with argument (CMD is ignored):"
+	docker run sample "+ (argument)"
+
+	@echo "##############################"
+	@echo "Overriden entrypoint with no arguments (CMD is ignored):"
+	docker run --entrypoint echo sample
+
+	@echo "##############################"
+	@echo "Overriden entrypoint with arguments (CMD is ignored):"
+	docker run --entrypoint echo sample "Hey Team 👋 (Overriden entrypoint + arguments)"

06-building-container-images/client-react/Dockerfile.3

@@ -14,15 +14,4 @@ RUN --mount=type=cache,target=/usr/src/app/.npm \
 
 COPY . .
 
-RUN npm run build
+CMD ["npm", "run", "dev"]
-
-# Use separate stage for deployable image
-FROM nginx:1.23-alpine
-
-COPY nginx.conf /etc/nginx/conf.d/default.conf
-
-COPY --from=build usr/src/app/dist/ /usr/share/nginx/html
-
-EXPOSE 80
-
-# No CMD specified... will uses CMD/ENTRYPOINT from base image (nginx:1.23-alpine)

06-building-container-images/client-react/Dockerfile.4

@@ -0,0 +1,28 @@
+FROM node:19.4-bullseye AS build
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+# Copy only files required to install
+# dependencies (better layer caching)
+COPY package*.json ./
+
+# Use cache mount to speed up install of existing dependencies
+RUN --mount=type=cache,target=/usr/src/app/.npm \
+  npm set cache /usr/src/app/.npm && \
+  npm install
+
+COPY . .
+
+RUN npm run build
+
+# Use separate stage for deployable image
+FROM nginx:1.23-alpine
+
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+COPY --from=build usr/src/app/dist/ /usr/share/nginx/html
+
+EXPOSE 80
+
+# No CMD specified... will uses CMD/ENTRYPOINT from base image (nginx:1.23-alpine)

06-building-container-images/client-react/Makefile

@@ -1,9 +1,9 @@
-API_NODE_PATH:=../../05-example-web-application/api-node/
+API_NODE_PATH:=../../05-example-web-application/client-react/
 
 N?=0
 .PHONY: build-N
 build-N:
-	docker build --file ./Dockerfile.$(N) -t api-node:$(N) ${API_NODE_PATH}
+	docker build --file ./Dockerfile.$(N) -t client-react:$(N) ${API_NODE_PATH}
 
 .PHONY: build-all
 build-all:

06-building-container-images/docker-compose.yml

@@ -2,18 +2,20 @@ services:
   client-react:
     build:
       context: ../05-example-web-application/client-react/
-      dockerfile: ../../06-building-container-images/client-react/Dockerfile.2
+      dockerfile: ../../06-building-container-images/client-react/Dockerfile.3
     ports:
       - 5173:5173
     volumes:
     - ${PWD}/client-react/vite.config.js:/usr/src/app/vite.config.js
+    restart: unless-stopped
   client-react-nginx:
     build:
       context: ../05-example-web-application/client-react/
-      dockerfile: ../../06-building-container-images/client-react/Dockerfile.3
+      dockerfile: ../../06-building-container-images/client-react/Dockerfile.4
     init: true
     ports:
       - 5174:80
+    restart: unless-stopped
   api-node:
     build:
       context: ../05-example-web-application/api-node/
@@ -25,6 +27,7 @@ services:
       - DATABASE_URL=postgres://postgres:foobarbaz@db:5432/postgres
     ports:
       - 3000:3000
+    restart: unless-stopped
   api-golang:
     build:
       context: ../05-example-web-application/api-golang/
@@ -36,6 +39,7 @@ services:
       - DATABASE_URL=postgres://postgres:foobarbaz@db:5432/postgres
     ports:
       - 8080:8080
+    restart: unless-stopped
   db:
     image: postgres:15.1-alpine
     environment: