I focused on Docker issues and that's the result

- Use package-lock.json through command: npm ci
- Fixes regarding Docker Compose setup
- Multistage build to get only what is needed for PRD image

Useful links
- https://git.io/JebrQ
- webpack/webpack#520 (comment)

.dockerignore

@@ -0,0 +1,26 @@
+# Defaults
+.git
+*Dockerfile*
+*docker-compose*
+
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by some tools
+coverage
+
+# Dependency directory
+node_modules
+
+# Custom
+__tests__
+jest.config.js

Dockerfile

@@ -1,9 +1,23 @@
-FROM node:12.14.0-alpine
+FROM node:12-alpine as build
 
 WORKDIR /app
-
 COPY . /app
 
-RUN npm run build
+# I don't know why but Next.JS require devDependencies to build the project
+RUN npm ci --only=production
+RUN cp -R node_modules prod_node_modules
+RUN npm ci && npm run build
+
+FROM node:12-alpine
+
+WORKDIR /app
+
+# Copy production node_modules
+COPY --from=build /app/prod_node_modules ./node_modules
+COPY --from=build /app/package.json ./
+# Server-side
+COPY --from=build /app/src ./src
+# SPA
+COPY --from=build /app/dist ./dist
 
 CMD npm run start

docker-compose.yml

@@ -6,17 +6,19 @@ services:
     env_file: .env
     ports:
       - "${NEXTJS_BIND_PORT}:${NEXTJS_BIND_PORT}"
-  unit-tests:
+  unit-test:
     image: node:12.14.0-alpine
     env_file: .env
     working_dir: /app
     volumes:
       - .:/app
-    command: npm run test-unit
-  int-tests:
+    command: >
+      sh -c "npm ci && npm run unit-test"
+  int-test:
     image: node:12.14.0-alpine
     env_file: .env
     working_dir: /app
     volumes:
       - .:/app
-    command: npm run test-int
+    command: >
+      sh -c "npm ci && npm run int-test"