Set up Travis continuous integration pipeline

.travis.yml

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+## Assuming the .travis.yml file is in the project directory, and there is a separate sub-directory for each service
+## Use either `docker-compose` or individual `docker build` commands
+## Build
+  - docker build -t udagram-api-feed ./udagram-api-feed
+  - docker build -t udagram-api-user ./udagram-api-user
+  - docker build -t udagram-api-frontend ./udagram-api-frontend
+  - docker build -t udagram-api-reverseproxy ./udagram-api-reverseproxy
+## Tagging
+  - docker tag udagram-api-feed dattm283/udagram-api-feed:v1
+  - docker tag udagram-api-user dattm283/udagram-api-user:v1
+  - docker tag udagram-api-frontend dattm283/udagram-api-frontend:v1
+  - docker tag udagram-api-reverseproxy dattm283/udagram-api-reverseproxy:v1
+## Push
+## Assuming DOCKER_PASSWORD and DOCKER_USERNAME are set in the Travis repository settings
+  - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+  - docker push dattm283/udagram-api-feed:v1
+  - docker push dattm283/udagram-api-user:v1
+  - docker push dattm283/udagram-api-frontend:v1
+  - docker push dattm283/udagram-api-reverseproxy:v1

docker-compose-build.yaml

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+version: "2"
+services:
+  reverseproxy:
+    build:
+      context: ./udagram-reverseproxy
+    image: reverseproxy
+  backend_user:
+    build:
+      context: ./udagram-api-user
+    image: udagram-api-user
+  backend_feed:
+    build:
+      context: ./udagram-api-feed
+    image: udagram-api-feed
+  frontend:
+    build:
+      context: ./udagram-frontend
+    image: udagram-frontend:local

docker-compose.yaml

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+version: "3"
+services:
+  reverseproxy:
+      image: reverseproxy
+      ports:
+          - 8080:8080
+      restart: always
+      depends_on:
+        - backend-user
+        - backend-feed
+  backend-user:
+    image: udagram-api-user
+    environment:
+      POSTGRES_USERNAME: $POSTGRES_USERNAME
+      POSTGRES_PASSWORD: $POSTGRES_PASSWORD 
+      POSTGRES_DB: $POSTGRES_DB 
+      POSTGRES_HOST: $POSTGRES_HOST
+      AWS_REGION: $AWS_REGION 
+      AWS_PROFILE: $AWS_PROFILE 
+      AWS_BUCKET: $AWS_BUCKET
+      JWT_SECRET: $JWT_SECRET
+      URL: "http://localhost:8100"
+  backend-feed:
+    image: udagram-api-feed
+    volumes:
+      - $HOME/.aws:/root/.aws
+    environment:
+      POSTGRES_USERNAME: $POSTGRES_USERNAME
+      POSTGRES_PASSWORD: $POSTGRES_PASSWORD 
+      POSTGRES_DB: $POSTGRES_DB
+      POSTGRES_HOST: $POSTGRES_HOST
+      AWS_REGION: $AWS_REGION
+      AWS_PROFILE: $AWS_PROFILE 
+      AWS_BUCKET: $AWS_BUCKET
+      JWT_SECRET: $JWT_SECRET
+      URL: "http://localhost:8100"
+  frontend:
+    image: udagram-frontend:local
+    ports:
+      - "8100:80"

udagram-api-feed/Dockerfile

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+FROM node:16
+## Create app directory
+WORKDIR /usr/src/app
+## Install app dependencies
+## A wildcard is used to ensure both package.json AND package-lock.json are copied where available (npm@5+)
+COPY package*.json ./
+RUN npm ci 
+## Bundle app source
+COPY . .
+EXPOSE 8080
+CMD [ "npm", "run", "prod" ]