restructure repo, separate sample app from docker configs

06-building-container-images/api-node/Dockerfile.0

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+FROM node
+
+COPY . .
+
+RUN npm install
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.1

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+# Pin specific version
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+COPY . .
+
+RUN npm install
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.2

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+# Pin specific version
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+COPY . .
+
+RUN npm install
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.3

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+# Pin specific version for stability
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+# Copy only files required to install
+# dependencies (better layer caching)
+COPY package*.json ./
+
+RUN npm install
+
+# Copy remaining source code AFTER installing dependencies. 
+# Again, copy only the necessary files
+COPY ./src/ .
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.4

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+# Pin specific version for stability
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+# Copy only files required to install
+# dependencies (better layer caching)
+COPY package*.json ./
+
+RUN npm install
+
+# Use non-root user
+# Use --chown on COPY commands to set file permissions
+USER node
+
+# Copy remaining source code AFTER installing dependencies. 
+# Again, copy only the necessary files
+COPY --chown=node:node ./src/ .
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.5

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+# Pin specific version for stability
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+# Set NODE_ENV
+ENV NODE_ENV production
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+# Copy only files required to install
+# dependencies (better layer caching)
+COPY package*.json ./
+
+# Install only production dependencies
+RUN npm ci --only=production
+
+# Use non-root user
+# Use --chown on COPY commands to set file permissions
+USER node
+
+# Copy remaining source code AFTER installing dependencies. 
+# Again, copy only the necessary files
+COPY --chown=node:node ./src/ .
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.6

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+# Pin specific version for stability
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+# Set NODE_ENV
+ENV NODE_ENV production
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+# Copy only files required to install
+# dependencies (better layer caching)
+COPY package*.json ./
+
+# Install only production dependencies
+RUN npm ci --only=production
+
+# Use non-root user
+# Use --chown on COPY commands to set file permissions
+USER node
+
+# Copy remaining source code AFTER installing dependencies. 
+# Again, copy only the necessary files
+COPY --chown=node:node ./src/ .
+
+# Indicate expected port
+EXPOSE 3000
+
+CMD [ "node", "index.js" ]

06-building-container-images/api-node/Dockerfile.7

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+# Pin specific version for stability
+# Use alpine for reduced image size
+FROM node:19.4-alpine
+
+# Set NODE_ENV
+ENV NODE_ENV production
+
+# Specify working directory other than /
+WORKDIR /usr/src/app
+
+# Copy only files required to install
+# dependencies (better layer caching)
+COPY package*.json ./
+
+# Install only production dependencies
+# 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 ci --only=production
+
+# Use non-root user
+# Use --chown on COPY commands to set file permissions
+USER node
+
+# Copy remaining source code AFTER installing dependencies. 
+# Again, copy only the necessary files
+COPY --chown=node:node ./src/ .
+
+# Indicate expected port
+EXPOSE 3000
+
+CMD [ "node", "index.js" ]
+
+# TODO: Use multi-stage with distroless image or chainguard image? 
+# https://github.com/GoogleContainerTools/distroless/blob/main/examples/nodejs/Dockerfile
+# https://edu.chainguard.dev/chainguard/chainguard-images/reference/node/overview/

06-building-container-images/api-node/Makefile

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+API_NODE_PATH:=../../05-example-web-application/api-node/
+
+N?=0
+.PHONY: build-N
+build-N:
+	docker build --file ./Dockerfile.$(N) -t api-node:$(N) ${API_NODE_PATH}
+
+.PHONY: build-all
+build-all:
+	for number in 0 1 2 3 4 5 6 7 ; do \
+			N=$$number $(MAKE) build-N; \
+	done