Cannot hot reload my ionic app integrated with Docker - docker

Question

I have this Dockerfile
FROM node:15.11.0-alpine
#ENVIRONNEMENT
ENV GLIB_PACKAGE_BASE_URL https://github.com/sgerrand/alpine-pkg-glibc/releases/download
ENV GLIB_VERSION 2.25-r0
ENV JAVA_HOME /usr/lib/jvm/java-1.8-openjdk
ENV GRADLE_HOME /usr/local/gradle
ENV GRADLE_VERSION 4.4
ENV ANDROID_HOME /usr/local/android-sdk-linux
ENV ANDRDOID_TOOLS_VERSION r25.2.5
ENV ANDROID_API_LEVELS android-26
ENV ANDROID_BUILD_TOOLS_VERSION 26.0.2
ENV IONIC_VERSION 5
ENV PATH ${GRADLE_HOME}/bin:${JAVA_HOME}/bin:${ANDROID_HOME}/tools:$ANDROID_HOME/platform-tools:$PATH
# INSTALL JAVA
RUN apk update ...
# INSTALL IONIC AND CORDOVA
RUN npm install -g cordova ionic#${IONIC_VERSION}
#INSTALL Graddle
RUN mkdir -p ${GRADLE_HOME} ...
# INSTALL ANDROID
RUN mkdir -p ${ANDROID_HOME} ...
# INSTALL GLIBC
RUN curl -L ...
# CONFIGURATION
RUN echo y | android update sdk --no-ui -a --filter platform-tools,${ANDROID_API_LEVELS},build-tools-${ANDROID_BUILD_TOOLS_VERSION}
# Make license agreement
RUN mkdir $ANDROID_HOME/licenses ...
#FILES DELETION
RUN rm -rf /tmp/* /var/cache/apk/*
WORKDIR /usr/app
RUN npm install
COPY ./ /usr/app
I am building it with CMD:
docker build -t <image-name> .
I have this docker-compose.yml file:
version: '3.6'
services:
app:
container_name: karma5_ionic
build:
context: .
dockerfile: Dockerfile
ports:
- '8100:8100'
- '35729:35729'
command: ionic serve --external
I run the following command:
sudo docker-compose up -d
The application is displaying fine in the browser in localhost:8100
Problem:
When I make changes, there is no hot reload.
localhost:35729 might be temporarily down or it may have moved permanently to a new web address.
Or localhost:35729 the connections was reset
The only way that i can see changes is if I
run docker-compose build
docker-compose up -d again

Answer 1

To whom it may concern:
I just needed to add
volumes:
- "./:/usr/app"
Whole docker-compose.yml file:
version: '3.6'
services:
app:
container_name: karma5_ionic
build:
context: .
dockerfile: Dockerfile
volumes:
- "./:/usr/app"
ports:
- '8100:8100'
- '35729:35729'
command: ionic serve --external