Allow local image build

- Remove dependency on github download
- Add `github/build.sh` for local builds
- Simplify gtaphhopper build
- Simplify handling of `graphhopper.sh` and `config-example.yml`

Dockerfile

@@ -1,10 +1,8 @@
 FROM maven:3.6.3-jdk-8 as build
 
-RUN apt-get install -y wget
-
 WORKDIR /graphhopper
 
-COPY . .
+COPY graphhopper .
 
 RUN mvn clean install
 
@@ -16,9 +14,9 @@ RUN mkdir -p /data
 
 WORKDIR /graphhopper
 
-COPY --from=build /graphhopper/web/target/graphhopper*.jar ./
+COPY --from=build /graphhopper/web/target/graphhopper*.jar .
 
-COPY ./config-example.yml ./
+COPY graphhopper.sh graphhopper/config-example.yml .
 
 COPY ./graphhopper.sh ./