feat: added support for specifying arch when building an image (#45)

### **PR Type**
Enhancement


___

### **Description**
• Added architecture parameter support to Docker image building
functions
• Set default architecture to `pkgs.go.GOARCH` for both generic and
Go-specific builders
• Enhanced `dockerImageFn` and `docker-image` functions with arch
configuration
• Improved cross-platform Docker image building capabilities


___



### **Changes walkthrough** 📝
<table><thead><tr><th></th><th align="left">Relevant
files</th></tr></thead><tbody><tr><td><strong>Enhancement</strong></td><td><table>
<tr>
  <td>
    <details>
<summary><strong>generic.nix</strong><dd><code>Add architecture
parameter to generic Docker functions</code>&nbsp; &nbsp; &nbsp;
</dd></summary>
<hr>

lib/generic/generic.nix

• Added <code>arch</code> parameter with default value
<code>pkgs.go.GOARCH</code> to <br><code>dockerImageFn</code><br> •
Updated function calls to pass <code>arch</code> parameter to
<br><code>nix2container.buildImage</code><br> • Enhanced
<code>docker-image</code> function with <br>architecture support


</details>


  </td>
<td><a
href="https://github.com/nhost/nixops/pull/45/files#diff-4fd7b531e0557f3d3821654731cc7ed209a62fa21ec7a5d93753481fd58d5340">+4/-2</a>&nbsp;
&nbsp; &nbsp; </td>

</tr>

<tr>
  <td>
    <details>
<summary><strong>go.nix</strong><dd><code>Add architecture parameter to
Go Docker functions</code>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;
&nbsp; &nbsp; </dd></summary>
<hr>

lib/go/go.nix

• Added <code>arch</code> parameter with default value
<code>pkgs.go.GOARCH</code> to <br>Go-specific
<code>dockerImageFn</code><br> • Updated function signatures and calls
to <br>include architecture parameter<br> • Enhanced Go Docker image
building <br>with cross-platform support


</details>


  </td>
<td><a
href="https://github.com/nhost/nixops/pull/45/files#diff-1377128cceefd42b43cd5e407ec11a809c7aaec2d071a1ed0e3232f6dce63fad">+4/-2</a>&nbsp;
&nbsp; &nbsp; </td>

</tr>
</table></td></tr></tr></tbody></table>

___

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Author: dbarrosop

lib/generic/generic.nix

@@ -8,9 +8,10 @@ let
     , copyToRoot ? null
     , maxLayers ? 100
     , config ? { }
+    , arch ? pkgs.go.GOARCH
     }:
     nix2containerPkgs.nix2container.buildImage {
-      inherit name tag created copyToRoot fromImage maxLayers config;
+      inherit name tag created copyToRoot fromImage maxLayers config arch;
     };
 in
 {
@@ -22,10 +23,11 @@ in
     , copyToRoot ? null
     , maxLayers ? 100
     , config ? { }
+    , arch ? pkgs.go.GOARCH
     }:
     pkgs.runCommand "image-as-dir" { } ''
       ${(dockerImageFn {
-        inherit name tag created fromImage copyToRoot maxLayers config;
+        inherit name tag created fromImage copyToRoot maxLayers config arch;
       }).copyTo}/bin/copy-to dir:$out
     '';
 }

lib/go/go.nix

@@ -17,11 +17,12 @@ let
     , package
     , buildInputs
     , maxLayers
+    , arch ? pkgs.go.GOARCH
     , contents ? [ ]
     , config ? { }
     }:
     nix2containerPkgs.nix2container.buildImage {
-      inherit name created maxLayers;
+      inherit name created maxLayers arch;
       tag = version;
 
       copyToRoot = pkgs.buildEnv {
@@ -168,12 +169,13 @@ in
     , package
     , buildInputs
     , maxLayers ? 100
+    , arch ? pkgs.go.GOARCH
     , contents ? [ ]
     , config ? { }
     }:
     pkgs.runCommand "image-as-dir" { } ''
       ${(dockerImageFn {
-        inherit name version created package buildInputs maxLayers contents config;
+        inherit name version created package buildInputs maxLayers arch contents config;
       }).copyTo}/bin/copy-to dir:$out
     '';
 }