try.gitea.io reporting internal server error on all requests

[techknowlogick]

• Gitea version (or commit ref): 1.14.0+dev-611-g0f726caf9
• Git version: 2.30.0
• Operating system: Alpine 3.13
• Database (use [x]):
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
• Log gist:

2021/01/26 21:04:45 ...s/context/context.go:183:HTML() [D] Template: repo/issue/list
2021/01/26 21:04:45 ...outers/routes/web.go:80:1() [E] PANIC: interface conversion: interface {} is nil, not *context.Context
	/usr/local/go/src/runtime/iface.go:261 (0x412bee)
	/go/src/code.gitea.io/gitea/modules/context/context.go:484 (0x214af9e)
	/go/src/code.gitea.io/gitea/routers/routes/base.go:40 (0x214aea1)
	/go/src/code.gitea.io/gitea/routers/routes/base.go:58 (0x214eaa4)
	/usr/local/go/src/net/http/server.go:2042 (0x76eb83)
	/go/src/code.gitea.io/gitea/routers/routes/web.go:88 (0x215345d)
	/usr/local/go/src/net/http/server.go:2042 (0x76eb83)
	/go/src/code.gitea.io/gitea/routers/routes/base.go:90 (0x214f29b)
	/usr/local/go/src/net/http/server.go:2042 (0x76eb83)
	/go/src/code.gitea.io/gitea/vendor/github.com/go-chi/chi/middleware/realip.go:34 (0x214a0dc)
	/usr/local/go/src/net/http/server.go:2042 (0x76eb83)
	/go/src/code.gitea.io/gitea/routers/routes/web.go:61 (0x2152f9c)
	/usr/local/go/src/net/http/server.go:2042 (0x76eb83)
	/go/src/code.gitea.io/gitea/vendor/github.com/go-chi/chi/mux.go:86 (0x1afbae3)
	/go/src/code.gitea.io/gitea/modules/web/route.go:267 (0x1f1f533)
	/go/src/code.gitea.io/gitea/vendor/github.com/gorilla/context/context.go:141 (0x1174333)

Description

...

[lunny]

Should be fixed by #14475