implements error log reporting (#464)

* implements error log reporting

* changes api post variables, includes warnings

appmgr/Cargo.lock

@@ -848,6 +848,7 @@ dependencies = [
  "sha2",
  "simple-logging",
  "sqlx",
+ "stderrlog",
  "tar",
  "thiserror",
  "tokio 1.11.0",
@@ -2958,6 +2959,19 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "stderrlog"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45a53e2eff3e94a019afa6265e8ee04cb05b9d33fe9f5078b14e4e391d155a38"
+dependencies = [
+ "atty",
+ "chrono",
+ "log",
+ "termcolor",
+ "thread_local",
+]
+
 [[package]]
 name = "stdweb"
 version = "0.4.20"
@@ -3183,6 +3197,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d40c6d1b69745a6ec6fb1ca717914848da4b44ae29d9b3080cbee91d72a69b14"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "time"
 version = "0.1.44"