Gitlab CI config for Dokku project

.gitlab-ci_dokku.yml

stages:
  - deploy
  
variables:
  APP_NAME: app-name
  GIT_DEPTH: 0
  
deploy:
  stage: deploy
  image: ilyasemenov/gitlab-ci-git-push
  environment:
    name: production
  only:
    - main
  script:
    - git-push ssh://dokku@$VM_IP:22/$APP_NAME

Dockerfile

# ---- Base Node ----
FROM node:12-stretch-slim AS base
ENV NODE_ENV=development
RUN mkdir /app && chown -R node:node /app
RUN mkdir /app/vue-client && chown -R node:node /app/vue-client
WORKDIR /app
USER node
RUN npm set progress=false && npm config set depth 0

# ---- Audit ----
FROM base AS audit
COPY --chown=node:node package*.json ./
RUN npm audit

# ---- Dependencies ----
FROM base AS server-dependencies
WORKDIR /app
COPY --chown=node:node package*.json ./
RUN npm ci --production && npm cache clean --force

# #---- Test ----
FROM server-dependencies AS test
RUN npm ci --development
COPY --chown=node:node ./server ./server
RUN npm test

# ---- Frontend Dependencies ----
FROM base AS front-dependencies
WORKDIR /app/vue-client
COPY --chown=node:node ./vue-client/package*.json ./
RUN npm ci && npm cache clean --force

# ---- Front ----
FROM front-dependencies AS front
WORKDIR /app/vue-client
COPY --chown=node:node ./vue-client ./
RUN npm run build

# ---- Release ----
FROM server-dependencies AS release
WORKDIR /app
COPY --chown=node:node --from=front /app/vue-client/build ./vue-client/build
COPY --chown=node:node ./server ./server
ENV NODE_ENV=production
CMD [ "node","server/server.js"]

• Once, in the Dokku machine, create a private key:
  ssh-keygen -t rsa
• Then add key to Dokku:
  dokku ssh-keys:add gitlabkey ~/.ssh/id_rsa.pub
• Add .gitlab-ci.yml to root of project.
• Add a Dockerfile that Dokku will interpret like above. It can be as you like or any type of project.
• On Gitlab.com in the project settings -> CI/CD -> Variables, add the following at least:
  SSH_PRIVATE_KEY (The private key generated in the Dokku machine: cat ~/.ssh/id_rsa)
  VM_IP (IP of the Dokku machine)