feat(config): use spf13/viper to read config from env vars

go.mod

@@ -13,6 +13,8 @@ require (
 	github.com/liamg/gifwrap v0.0.7
 	github.com/liamg/tml v0.6.0
 	github.com/spf13/cobra v1.6.1
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.15.0
 	github.com/stretchr/testify v1.8.2
 	github.com/zclconf/go-cty v1.10.0
 	gopkg.in/yaml.v2 v2.4.0
@@ -40,6 +42,7 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dlclark/regexp2 v1.4.0 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
 	github.com/gdamore/encoding v1.0.0 // indirect
 	github.com/gdamore/tcell/v2 v2.5.0 // indirect
 	github.com/ghodss/yaml v1.0.0 // indirect
@@ -56,6 +59,7 @@ require (
 	github.com/hashicorp/go-getter v1.7.0 // indirect
 	github.com/hashicorp/go-safetemp v1.0.0 // indirect
 	github.com/hashicorp/go-uuid v1.0.3 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/hashicorp/hcl/v2 v2.14.1 // indirect
 	github.com/imdario/mergo v0.3.13 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
@@ -68,6 +72,7 @@ require (
 	github.com/liamg/iamgo v0.0.9 // indirect
 	github.com/liamg/jfather v0.0.7 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
@@ -78,14 +83,18 @@ require (
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
 	github.com/open-policy-agent/opa v0.44.1-0.20220927105354-00e835a7cc15 // indirect
 	github.com/owenrumney/squealer v1.1.1 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
 	github.com/pjbgf/sha1cd v0.2.3 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0 // indirect
 	github.com/sergi/go-diff v1.1.0 // indirect
 	github.com/sirupsen/logrus v1.9.0 // indirect
 	github.com/skeema/knownhosts v1.1.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/spf13/afero v1.9.3 // indirect
+	github.com/spf13/cast v1.5.0 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/subosito/gotenv v1.4.2 // indirect
 	github.com/tchap/go-patricia/v2 v2.3.1 // indirect
 	github.com/ulikunitz/xz v0.5.10 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
@@ -108,6 +117,7 @@ require (
 	google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef // indirect
 	google.golang.org/grpc v1.52.0 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )