fix cargo near build

contract/Cargo.toml

@@ -6,6 +6,20 @@ edition.workspace = true
 license.workspace = true
 authors.workspace = true
 
+# fields to configure build with WASM reproducibility, according to specs  
+# in https://github.com/near/NEPs/blob/master/neps/nep-0330.md 
+[package.metadata.near.reproducible_build]
+# docker image, descriptor of build environment
+image = "sourcescan/cargo-near:git-e3c8adb4b5542cbfc159bb1534f2b94c900c1648-1.80.0"
+# tag after colon above serves only descriptive purpose; image is identified by digest
+image_digest = "sha256:4bbcdf985936e1cb9b71c627a00cb9b53546ac0c9ef6b175da2918c1dea21363"
+# build command inside of docker container 
+# if docker image from default gallery is used https://hub.docker.com/r/sourcescan/cargo-near/tags,
+# the command may be any combination of flags of `cargo-near`,
+# supported by respective version of binary inside the container besides `--no-locked` flag
+container_build_command = ["cargo", "near", "build"]
+
+
 [lib]
 crate-type = ["cdylib"]