fix: bundle ca-certs directly in the binary

Containerfile

@@ -1,5 +1,6 @@
 # This file is used directly by the goreleaser build
 # It is used to build the final container image
 FROM scratch
+WORKDIR /
 COPY /smtp2shoutrrr /usr/bin/smtp2shoutrrr
 ENTRYPOINT ["/usr/bin/smtp2shoutrrr"]

cmd/smtp2shoutrrr/main.go

@@ -9,6 +9,8 @@ import (
 	"git.nakama.town/fmartingr/gotoolkit/model"
 	"git.nakama.town/fmartingr/gotoolkit/service"
 	"git.nakama.town/fmartingr/smtp2shoutrrr"
+
+	_ "golang.org/x/crypto/x509roots/fallback"
 )
 
 func main() {

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/containrrr/shoutrrr v0.8.0
 	github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21
 	github.com/emersion/go-smtp v0.21.3
+	golang.org/x/crypto/x509roots/fallback v0.0.0-20250118192723-a8ea4be81f07
 )
 
 require (

go.sum

@@ -37,6 +37,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/crypto/x509roots/fallback v0.0.0-20250118192723-a8ea4be81f07 h1:Tuk3hxOkRoX4Xwph6/tRU1wGumEsVYM2TZfvAC6MllM=
+golang.org/x/crypto/x509roots/fallback v0.0.0-20250118192723-a8ea4be81f07/go.mod h1:kNa9WdvYnzFwC79zRpLRMJbdEFlhyM5RPFBBZp/wWH8=
 golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
 golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=