Cache better (#296)

* Many improvements around bandwidth use

- Use ETags for RSS/Atom feeds
- Use cache-control headers
- Update to rust nightly (for rust-analyzer and faster builds)
- Limit feeds to the last 20 posts:
  https://twitter.com/theprincessxena/status/1349891678857998339
- Use if-none-match to limit bandwidth further

Also does this:

- bump go_vanity to 0.3.0 and lets users customize the branch name
- fix formatting on jsonfeed
- remove last vestige of kubernetes/docker support

Signed-off-by: Christine Dodrill <me@christine.website>

* expire cache quicker for dynamic pages

Signed-off-by: Christine Dodrill <me@christine.website>

* add rss ttl

Signed-off-by: Christine Dodrill <me@christine.website>

* add blogpost

Signed-off-by: Christine Dodrill <me@christine.website>

1 files changed, 1 insertions, 1 deletions

diff --git a/shell.nix b/shell.nix
index 1d1c111..af22215 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,7 +5,7 @@ let
   dhall-yaml = dhallpkgs.dhall-yaml-simple;
   dhall = dhallpkgs.dhall-simple;
   xepkgs = import sources.xepkgs { inherit pkgs; };
-  rust = import ./nix/rust.nix { };
+  rust = pkgs.callPackage ./nix/rust.nix { };
 in with pkgs;
 with xepkgs;
 mkShell {