Move BASE_URL to the build script

Dockerfile

@@ -5,6 +5,9 @@
 FROM node:alpine AS build-frontend
 WORKDIR /src
 
+# Define base address
+ARG BASE_URL=/
+
 # Install the angular CLI
 RUN npm install -g @angular/cli
 
@@ -18,7 +21,7 @@ RUN npm install
 COPY ./src/MistoxWebsite.Client/ ./
 
 # Compile the source
-RUN ng build
+RUN ng build --base-href=${BASE_URL}
 
 #####################
 ##  Build Backend  ##