Add latest commit info to git version (#1316)

* Add latest commit info to git version

* Testing docker build

* Use fallback; modify format

* Revert "Testing docker build"

This reverts commit 197140d697.

* Modify fallback to have crate version

Cargo.lock

@@ -2019,6 +2019,28 @@ version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcc8e0c9bce37868955864dbecd2b1ab2bdf967e6f28066d65aaac620444b65c"
 
+[[package]]
+name = "git-version"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94918e83f1e01dedc2e361d00ce9487b14c58c7f40bab148026fa39d42cb41e2"
+dependencies = [
+ "git-version-macro",
+ "proc-macro-hack",
+]
+
+[[package]]
+name = "git-version-macro"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34a97a52fdee1870a34fa6e4b77570cba531b27d1838874fef4429a791a3d657"
+dependencies = [
+ "proc-macro-hack",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "glob"
 version = "0.3.0"
@@ -2902,6 +2924,7 @@ dependencies = [
  "environment",
  "eth2_testnet_config",
  "futures 0.3.5",
+ "git-version",
  "logging",
  "slog",
  "slog-async",