[CHANGE] Fully enable customization of install directory

[ross-spencer]

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Install allows a user to specify an installation directory but filetrove uses hard-coded paths to determine locations, e.g. in the diff below I have tried to demonstrate each affected path on application startup with my own tmp path (the list isn't exhaustive):

diff --git a/cmd/ftrove/main.go b/cmd/ftrove/main.go
index ebbd0c5..f1c05f5 100644
--- a/cmd/ftrove/main.go
+++ b/cmd/ftrove/main.go
@@ -153,7 +153,7 @@ func main() {
 	}
 
 	// Change logger to MultiWriter for output to logfile and os.Stdout
-	logfd, err := os.OpenFile("logs/filetrove.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	logfd, err := os.OpenFile("/tmp/filetrove/logs/filetrove.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
 	if err != nil {
 		logger.Error("Could not open filetrove log file.", slog.String("error", err.Error()))
 		os.Exit(1)
@@ -230,7 +230,7 @@ func main() {
 	nsrlcount := 0
 
 	// Prepare BoltDB for reading hashes
-	db, err := ft.ConnectNSRL("db/nsrl.db")
+	db, err := ft.ConnectNSRL("/tmp/filetrove/db/nsrl.db")
 	if err != nil {
 		logger.Error("Could not connect to NSRL database", slog.String("error", err.Error()))
 		err = ftdb.Close()
@@ -343,7 +343,7 @@ func main() {
 	}
 
 	// Initialize siegfried database
-	s, err := siegfried.Load("db/siegfried.sig")
+	s, err := siegfried.Load("/tmp/filetrove/db/siegfried.sig")
 	if err != nil {
 		logger.Error("Could not read siegfried's database.", slog.String("error", err.Error()))
 		err = ftdb.Close()
diff --git a/db.go b/db.go
index cb16074..c7da8d7 100644
--- a/db.go
+++ b/db.go
@@ -234,7 +234,7 @@ func ListSessions(db *sql.DB) error {
 // ExportSessionSessionTSV exports all session metadata from a session to a TSV file.
 // Filtering is done by session UUID.
 func ExportSessionSessionTSV(sessionuuid string) ([]string, error) {
-	db, err := sql.Open("sqlite3", "db/filetrove.db")
+	db, err := sql.Open("sqlite3", "/filetrove/tmp/db/filetrove.db")
 	if err != nil {
 		return nil, err
 	}
@@ -312,7 +312,7 @@ func ExportSessionSessionTSV(sessionuuid string) ([]string, error) {
 // ExportSessionFilesTSV exports all file metadata from a session to a TSV file.
 // Filtering is done by session UUID.
 func ExportSessionFilesTSV(sessionuuid string) error {
-	db, err := sql.Open("sqlite3", "db/filetrove.db")
+	db, err := sql.Open("sqlite3", "/tmp/filetrove/db/filetrove.db")
 	if err != nil {
 		return err
 	}
@@ -389,7 +389,7 @@ func ExportSessionFilesTSV(sessionuuid string) error {
 // ExportSessionDirectoriesTSV exports all directory metadata from a session to a TSV file.
 // Filtering is done by session UUID.
 func ExportSessionDirectoriesTSV(sessionuuid string) error {
-	db, err := sql.Open("sqlite3", "db/filetrove.db")
+	db, err := sql.Open("sqlite3", "/tmp/filetrove/db/filetrove.db")
 	if err != nil {
 		return err
 	}
@@ -465,7 +465,7 @@ func ExportSessionDirectoriesTSV(sessionuuid string) error {
 
 // ExportSessionEXIFTSV exports all exif metadata from a session to a TSV file. Filtering is done by session UUID.
 func ExportSessionEXIFTSV(sessionuuid string) error {
-	db, err := sql.Open("sqlite3", "db/filetrove.db")
+	db, err := sql.Open("sqlite3", "/tmp/filetrove/db/filetrove.db")
 	if err != nil {
 		return err
 	}
@@ -541,7 +541,7 @@ func ExportSessionEXIFTSV(sessionuuid string) error {
 
 // ExportSessionDCTSV exports all exif metadata from a session to a TSV file. Filtering is done by session UUID.
 func ExportSessionDCTSV(sessionuuid string) error {
-	db, err := sql.Open("sqlite3", "db/filetrove.db")
+	db, err := sql.Open("sqlite3", "/tmp/filetrove/db/filetrove.db")
 	if err != nil {
 		return err
 	}

Describe the solution you'd like A clear and concise description of what you want to happen.

• Read a root path for filetrove from a single variable/location.
• Consider a toml file or env file for reading on startup.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Leaving the code as-is will likely break use anywhere that isn't a standalone use of the tool, e.g. installed from /usr/bin where the user probably doesn't also want to install filetrove's static files there.