Update bazelrc (#10)

Author: rygx

.bazelrc

@@ -1,3 +1,8 @@
+build -c opt
+
 # https://github.com/bazelbuild/rules_foreign_cc/issues/1129#issuecomment-1863628259
 build --noincompatible_sandbox_hermetic_tmp
-test --test_output=all
+test --test_output=all
+
+# Optionally use private .bazelrc.local
+try-import %workspace%/.bazelrc.local

.gitignore

@@ -6,4 +6,5 @@ bazel-testlogs
 genhtml
 *.log
 *.out
-.envrc.local
+.envrc.local
+.bazelrc.local