Start strapi in dev configuration

Dockerfile

# Use the official lightweight Node.js image.
# https://hub.docker.com/_/node
FROM node:14.5.0-slim

# Create and change to the app directory.
WORKDIR /usr/src/app

# Set PROD/DEV environment
ENV NODE_ENV=development
#ENV NODE_ENV=production

# Copy application dependency manifests to the container image.
# A wildcard is used to ensure both package.json AND package-lock.json are copied.
# Copying this separately prevents re-running npm install on every code change.
COPY package*.json ./

# Update packages
RUN apt-get update -y

# Install yarn
RUN apt-get install yarn -y

# GCC, G++, Python, Make needed if Node version > 12. When v12 in use you can comment out below dependencies
RUN apt-get install gcc -y
RUN apt-get install g++ -y
RUN apt-get install python3 -y
RUN apt-get install make -y

# Install production dependencies.
RUN yarn install --production=true

# Copy local code to the container image.
COPY . ./

# Build Strapi
RUN yarn build

#EXPOSE 1337

# Run the web service on container startup.
CMD [ "yarn", "develop" ]