I have the following docker file.
#Dockerfile
FROM node:alpine
WORKDIR /backend
COPY package*.json .
RUN yarn
COPY . .
EXPOSE 5000
CMD ["yarn", "dev"]
Nodemon works as intended on host machine but shows the following error message when running the container.
yarn run v1.22.5
$ nodemon
/bin/sh: nodemon: not found
error Command failed with exit code 127.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Nodemon is not installed globally in the host machine. Adding RUN yarn add global nodemon on Dockerfile just adds an extra warning ../package.json: No license field in the container error.
I currently have the following package.json file with the following dev dependencies
# package.json
...
"scripts": {
"build": "tsc -p .",
"start": "node ./dist/src/index.js",
"dev": "nodemon",
"test": "echo \"Error: no test specified\" && exit 1"
},
"devDependencies": {
"@types/express": "^4.17.11",
"@types/node": "^14.14.34",
"nodemon": "^2.0.7",
"ts-node": "^9.1.1",
"typescript": "^4.2.3"
},
...
and nodemon.json as
{
"watch": [
"src"
],
"ext": "ts,json",
"ignore": [
"src/**/*.spec.ts"
],
"exec": "yarn ts-node src/index.ts"
}
Try with below,
#Dockerfile
FROM node:alpine
WORKDIR /backend
COPY package*.json .
RUN yarn
RUN yarn add global nodemon
COPY . .
EXPOSE 5000
CMD ["yarn", "dev"]
SIDE NOTE: You better not using nodemon in production. Serve build files as in your start script. You have to add the build command before yarn start.
#Dockerfile
FROM node:alpine
WORKDIR /backend
COPY package*.json .
RUN yarn
COPY . .
RUN yarn run build
EXPOSE 5000
CMD ["yarn", "start"]