Add more resources to the contrib docs.

Author: ehuss

src/doc/contrib/src/team.md

@@ -61,6 +61,10 @@ Members are given privileges, such as:
 The team meets on a weekly basis on a video chat.
 If you are interested in participating, feel free to contact us on [Zulip].
 
+Minutes for all meetings are recorded on [HackMD][meeting-minutes].
+
+[meeting-minutes]: https://hackmd.io/team/rust-cargo-team?nav=overview&tags=%5B%22meetings%22%5D
+
 ### Becoming a member
 
 A contributor can become a member of the Cargo Team by requesting a review or being nominated by one of the existing members.
@@ -71,6 +75,27 @@ Contributors who wish to join the team should exhibit an interest in carrying th
 
 Members may leave at any time, preferably by letting the team know ahead of time.
 
+## Team resources
+
+### Zulip
+
+The Cargo team has several streams on Zulip:
+
+- [`#t-cargo`](https://rust-lang.zulipchat.com/#narrow/stream/246057-t-cargo) --- General public channel for discussing any topics related to Cargo.
+- [`#t-cargo/build-integration`](https://rust-lang.zulipchat.com/#narrow/stream/334885-t-cargo.2Fbuild-integration) --- Discussions about integration with build systems.
+- [`#t-cargo/PubGrub`](https://rust-lang.zulipchat.com/#narrow/stream/260232-t-cargo.2FPubGrub) --- Discussions about the [PubGrub](https://github.com/pubgrub-rs/pubgrub) project.
+
+The following are private streams for the Cargo team. The team should avoid using this unless necessary (for example, discussing a security issue or team and meeting organization).
+
+- [`#t-cargo/private`](https://rust-lang.zulipchat.com/#narrow/stream/296752-t-cargo.2Fprivate) --- Private channel for discussions among the team.
+- [`#t-cargo/meetings`](https://rust-lang.zulipchat.com/#narrow/stream/364532-t-cargo.2Fmeetings) --- Private channel for discussions about team meetings, including non-members who regularly attend the meetings.
+
+### HackMD
+
+The Cargo team has a shared, public workspace on HackMD at <https://hackmd.io/team/rust-cargo-team> for drafting documents and recording meeting minutes.
+
+Since this HackMD workspace is using the free service, it does not support private documents. If you need to draft a private document, create it in your personal workspace and use private channels to share the link.
+
 ## Decision process
 
 The team uses a consensus-driven process for making decisions ranging from new features and major changes to management of the team itself.