Add a Dockerfile, update the hash in the main.cpp to match the docker output

Dockerfile

@@ -0,0 +1,8 @@
+FROM wiiuenv/devkitppc:20200810
+
+COPY --from=wiiuenv/libiosuhax:20200812 /artifacts $DEVKITPRO
+COPY --from=devkitpro/devkitarm:20200730 $DEVKITPRO/devkitARM $DEVKITPRO/devkitARM
+
+ENV DEVKITARM=/opt/devkitpro/devkitARM
+
+WORKDIR project

README.md

@@ -0,0 +1,14 @@
+## Building using the Dockerfile
+
+It's possible to use a docker image for building. This way you don't need anything installed on your host system.
+
+```
+# Build docker image (only needed once)
+docker build . -t aromainstaller-builder
+
+# make 
+docker run -it --rm -v ${PWD}:/project aromainstaller-builder make
+
+# make clean
+docker run -it --rm -v ${PWD}:/project aromainstaller-builder make clean
+```

source/main.cpp

@@ -18,7 +18,7 @@ constexpr bool strings_equal(char const *a, char const *b) {
     return std::string_view(a) == b;
 }
 
-static_assert(strings_equal(RPX_HASH, "116cff322148216f38b1eaaf296d1cffc6a3a98f"), "Built with an untested root.rpx! Remove this check if you really know what you're doing.");
+static_assert(strings_equal(RPX_HASH, "6c9eab8fc74a4c9d583d6fdac19c2f012f9a94e6"), "Built with an untested root.rpx! Remove this check if you really know what you're doing.");
 
 void initIOSUHax();