| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| crypto/tls | Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446. |
| crypto/x509 | Package x509 implements a subset of the X.509 standard. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/crypto/acme | Package acme provides an implementation of the Automatic Certificate Management Environment (ACME) spec, most famously used by Let's Encrypt. |
| golang.org/x/crypto/acme/autocert | Package autocert provides automatic access to certificates from Let's Encrypt and any other ACME-based CA. |
| golang.org/x/sync/singleflight | Package singleflight provides a duplicate function call suppression mechanism. |
| net | Package net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets. |
| net/http | Package http provides HTTP client and server implementations. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| zgo.at/goatcounter/v2 | |
| zgo.at/zdb | |
| zgo.at/zhttp | |
| zgo.at/zlog | |