misc info to readme

README.md

@@ -24,3 +24,31 @@ NOTE: Unless your user is a member of the `docker` group, you will need root for
 
 The build _should_ complete without errors and if you run `docker image ls` you should
 see `treebird:latest` (or whatever alt image tag you set in the previous command).
+
+## Troubleshooting
+Various issues I have seen and solutions
+
+### Random Issue I Saw - I
+On older versions of debian you need to install `docker.io` to get docker
+(the container software) rather than docker (some utility for docking widgets in GUIs I think).
+
+### Random Issue I Saw - II
+If the container build fails and you get the following message:
+
+	The key(s) in the keyring /etc/apt/trusted.gpg.d/debian-archive-bullseye-automatic.gpg are ignored as the file is not readable by user '_apt' executing
+
+Try building the container locally or on another system. I saw this when running
+from debian stable VPS. I think it is some kind of permission issue due to kernel
+or docker version differences because the exact same image runs fine on other host distros.
+
+After building elsewhere you can do the following:
+
+	docker save treebird:latest -o treebird.dsave
+	rsync -avP treebird.dsave name@myserver:~/
+	ssh name@myserver
+	docker load -i treebird.dsave
+
+### Random Issue I Saw - III
+In the nginx config it handles more than one set of a `fastcgi_param` very poorly
+so if you `include fastcgi.conf` and try to set SCRIPTNAME after, it will fail to
+update it and you will get the usual fastcgi cryptic error.