Fix Dockerfile

Dockerfile

@@ -15,20 +15,9 @@ RUN \
 
 COPY . /minetest-wasm
 
-# Install emsdk
-RUN \
-	   cd "$HOME" \
-	&& echo "Building from $(pwd)" \
-	&& git clone --depth 1 https://github.com/emscripten-core/emsdk.git \
-	&& cd emsdk \
-	&& ./emsdk install latest \
-	&& ./emsdk activate latest
-
 # Build minetest-wasm
 RUN \
-	   cd "$HOME"/emsdk \
-	&& . ./emsdk_env.sh \
-	&& cd /minetest-wasm \
+	   cd /minetest-wasm \
 	&& ls -la \
         && ./install_emsdk.sh \
 	&& ./build_all.sh