Dockerfile to tabs

scripts/Dockerfile

@@ -1,7 +1,7 @@
 # Build with:
-# 	docker build -t termux/package-builder .
+#	docker build -t termux/package-builder .
 # Push to docker hub with:
-# 	docker push termux/package-builder
+#	docker push termux/package-builder
 # This is done after changing this file or any of the
 # scripts/setup-{ubuntu,android-sdk}.sh setup scripts.
 FROM ubuntu:18.10
@@ -14,20 +14,20 @@ COPY ./setup-ubuntu.sh ./setup-android-sdk.sh ./properties.sh /tmp/
 
 # Setup needed packages and the Android SDK and NDK:
 RUN apt-get update && \
-    apt-get -yq upgrade && \
-    apt-get install -yq sudo && \
-    adduser --disabled-password --shell /bin/bash --gecos "" builder && \
-    echo "builder ALL=(root) NOPASSWD:ALL" > /etc/sudoers.d/builder && \
-    chmod 0440 /etc/sudoers.d/builder && \
-    su - builder -c /tmp/setup-ubuntu.sh && \
-    su - builder -c /tmp/setup-android-sdk.sh && \
-    # Removed unused parts to make a smaller Docker image:
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/* && \
-    cd /home/builder/lib/android-ndk/ && \
-    rm -Rf sources/cxx-stl/system && \
-    cd /home/builder/lib/android-sdk/tools && \
-    rm -Rf emulator* lib* proguard templates
+	apt-get -yq upgrade && \
+	apt-get install -yq sudo && \
+	adduser --disabled-password --shell /bin/bash --gecos "" builder && \
+	echo "builder ALL=(root) NOPASSWD:ALL" > /etc/sudoers.d/builder && \
+	chmod 0440 /etc/sudoers.d/builder && \
+	su - builder -c /tmp/setup-ubuntu.sh && \
+	su - builder -c /tmp/setup-android-sdk.sh && \
+	# Removed unused parts to make a smaller Docker image:
+	apt-get clean && \
+	rm -rf /var/lib/apt/lists/* && \
+	cd /home/builder/lib/android-ndk/ && \
+	rm -Rf sources/cxx-stl/system && \
+	cd /home/builder/lib/android-sdk/tools && \
+	rm -Rf emulator* lib* proguard templates
 
 # We expect this to be mounted with '-v $PWD:/home/builder/termux-packages':
 WORKDIR /home/builder/termux-packages