Fix caching and set home to /user

Test Plan: Ran build

X-Origin-Diff: phab/D220
GitOrigin-RevId: d93c13b9a74c45d717e92151cdb10f0f3484a78b
diff --git a/build/utils/BUILD b/build/utils/BUILD
index d1abdd4..216ffff 100644
--- a/build/utils/BUILD
+++ b/build/utils/BUILD
@@ -77,7 +77,7 @@
         make configure
         ./configure CC="$$MUSL/bin/musl-gcc" CFLAGS="-static" --prefix=$$MUSL
         echo COMPILERING
-        make mkfs
+        make mkfs -j8
     ) > /dev/null
 
     cp external/xfsprogs_dev/mkfs/mkfs.xfs $(RULEDIR)
diff --git a/scripts/create_container.sh b/scripts/create_container.sh
index 80f4581..5b4c65d 100755
--- a/scripts/create_container.sh
+++ b/scripts/create_container.sh
@@ -28,10 +28,10 @@
 # https://github.com/containers/libpod/issues/4318
 podman run -it -d \
     -v $(pwd):/work \
-    -v smalltown-gopath:/root/go/pkg \
-    -v smalltown-gobuildcache:/root/.cache/go-build \
-    -v smalltown-bazelcache:/root/.cache/bazel/_bazel_root/cache \
-    --tmpfs=/root/.cache/bazel:exec \
+    -v smalltown-gopath:/user/go/pkg \
+    -v smalltown-gobuildcache:/user/.cache/go-build \
+    -v smalltown-bazelcache:/user/.cache/bazel/_bazel_root/cache \
+    --tmpfs=/user/.cache/bazel:exec \
     --device /dev/kvm \
     --privileged \
     --userns=keep-id \