Update Dockerfile

The Source command does not have an effect on the current shell, but only on subshells. Therefore, the nvm command is not available in the current shell after the Source command. Set the NVM_DIR environment variable, then load nvm into the current shell.

Dockerfile

@@ -42,7 +42,7 @@ RUN ./mvnw clean verify -DskipTests
 FROM eclipse-temurin:21-jdk-jammy
 
 # Install Node.JS and NPM via NVM. 
-RUN /bin/bash -c "curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash && source ~/.bashrc && nvm install v20.13.1 && nvm use v20.13.1"
+RUN /bin/bash -c "curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash && export NVM_DIR=\"$HOME/.nvm\" && [ -s \"$NVM_DIR/nvm.sh\" ] && . \"$NVM_DIR/nvm.sh\" && nvm install v20.13.1 && nvm use v20.13.1"
 
 # Install PostgreSQL and change PostgreSQL authentication to trust. 
 # Install the PostgreSQL package. Remove the package lists to reduce the image size.