feat(sharkey): add ansible role for deployment

roles/sharkey/README.md

@@ -0,0 +1,11 @@
+# `finallycoffee.fediverse.sharkey` ansible role
+
+## Configuration
+
+## Behind a proxy
+
+The ansible role itself will respect system proxies (in the env var `HTTP_PROXY`/`https_proxy`).
+
+To use this role with a registry like Artifactory or Nexus3,
+set `sharkey_repo_server` to your registry server with full
+protocol, hostname, port. For example `sharkey_repo_server: "https://my.orgs.registry.local:8443/sharkey-internet-proxy/"`