Dockerfile

# A dockerfile must always start by importing the base image.
# We use the keyword 'FROM' to do that.
# In our example, we want to import the Strapi image.
# So we write 'strapi/base' for the image name. ':14' is a tag that means we use NodeJS v14 (The latest LTS version).
FROM strapi/base:14

# Set Environment to Production Environment (Optional to include in Dockerfile)
ENV NODE_ENV production

# Set up working directory that will be used to copy files/directories below :
WORKDIR /app

# Copy package.json to root directory inside Docker container of Strapi app
COPY package.json .

# Copy yarn.lock to root directory inside Docker container of Strapi app
COPY yarn.lock .

# Install dependencies, but not generate a yarn.lock lockfile and fail if an update is needed. 
RUN yarn install --frozen-lockfile

# == Copy required files ==
# In order to launch our Strapi app, we must import it into our image.
# We use the keyword 'COPY' to do that.
# The first parameter is the name of the file on the host.
# The second parameter is the path where to put the file on the image.
# '.' or '/' means the file will be put in the image root folder.
COPY favicon.ico .
COPY public/robots.txt public/
COPY extensions/ extensions/
# COPY exports/ exports/
COPY api/ api/
COPY config/ config/

# Generate a folder called 'dist'.
# A 'dist' folder stands for distributable and refers to a directory where files will be stored that can be directly used by others without the need to compile or minify the source code that is being reused.
RUN yarn build

# Run on port 1337
EXPOSE 1337

# We need to define the command to launch when we are going to run the image.
# We use the keyword 'CMD' to do that.
# The following command will execute "yarn start".
CMD ["yarn", "start"]