refactor: http interfaces (#114)

* implement custom http handler interface

* implement trace_id

* normalize http method spacing for consistent logs

* fix failing test

* fix linter errors

* cleanup old dead code

* more route cleanup

* cleanup some inconsistent errors

* update and generate code

* make taskfile more consistent

* update task calls

* run tidy

* drop `@` tag for version

* use relative paths

* tidy

* fix auto-setting variables

* update build paths

* add contributing guide

* tidy

backend/pkgs/server/handler.go

@@ -0,0 +1,25 @@
+package server
+
+import (
+	"net/http"
+)
+
+type HandlerFunc func(w http.ResponseWriter, r *http.Request) error
+
+func (f HandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) error {
+	return f(w, r)
+}
+
+type Handler interface {
+	ServeHTTP(http.ResponseWriter, *http.Request) error
+}
+
+// ToHandler converts a function to a customer implementation of the Handler interface.
+// that returns an error. This wrapper around the handler function and simply
+// returns the nil in all cases
+func ToHandler(handler http.Handler) Handler {
+	return HandlerFunc(func(w http.ResponseWriter, r *http.Request) error {
+		handler.ServeHTTP(w, r)
+		return nil
+	})
+}